github.com/keysonZZZ/kmg@v0.0.0-20151121023212-05317bfd7d39/encoding/kmgYaml/yaml_emitter_write.go

package kmgYaml

// Write the BOM character.
func yaml_emitter_write_bom(emitter *yaml_emitter_t) bool {
	if !flush(emitter) {
		return false
	}
	pos := emitter.buffer_pos
	emitter.buffer[pos+0] = '\xEF'
	emitter.buffer[pos+1] = '\xBB'
	emitter.buffer[pos+2] = '\xBF'
	emitter.buffer_pos += 3
	return true
}

func yaml_emitter_write_indent(emitter *yaml_emitter_t) bool {
	indent := emitter.indent
	if indent < 0 {
		indent = 0
	}
	if !emitter.indention || emitter.column > indent || (emitter.column == indent && !emitter.whitespace) {
		if !put_break(emitter) {
			return false
		}
	}
	for emitter.column < indent {
		if !put(emitter, ' ') {
			return false
		}
	}
	emitter.whitespace = true
	emitter.indention = true
	return true
}

func yaml_emitter_write_indicator(emitter *yaml_emitter_t, indicator []byte, need_whitespace, is_whitespace, is_indention bool) bool {
	if need_whitespace && !emitter.whitespace {
		if !put(emitter, ' ') {
			return false
		}
	}
	if !write_all(emitter, indicator) {
		return false
	}
	emitter.whitespace = is_whitespace
	emitter.indention = (emitter.indention && is_indention)
	emitter.open_ended = false
	return true
}

func yaml_emitter_write_anchor(emitter *yaml_emitter_t, value []byte) bool {
	if !write_all(emitter, value) {
		return false
	}
	emitter.whitespace = false
	emitter.indention = false
	return true
}

func yaml_emitter_write_tag_handle(emitter *yaml_emitter_t, value []byte) bool {
	if !emitter.whitespace {
		if !put(emitter, ' ') {
			return false
		}
	}
	if !write_all(emitter, value) {
		return false
	}
	emitter.whitespace = false
	emitter.indention = false
	return true
}

func yaml_emitter_write_tag_content(emitter *yaml_emitter_t, value []byte, need_whitespace bool) bool {
	if need_whitespace && !emitter.whitespace {
		if !put(emitter, ' ') {
			return false
		}
	}
	for i := 0; i < len(value); {
		var must_write bool
		switch value[i] {
		case ';', '/', '?', ':', '@', '&', '=', '+', '$', ',', '_', '.', '~', '*', '\'', '(', ')', '[', ']':
			must_write = true
		default:
			must_write = is_alpha(value, i)
		}
		if must_write {
			if !write(emitter, value, &i) {
				return false
			}
		} else {
			w := width(value[i])
			for k := 0; k < w; k++ {
				octet := value[i]
				i++

				c := octet >> 4
				if c < 10 {
					c += '0'
				} else {
					c += 'A' - 10
				}
				if !put(emitter, c) {
					return false
				}

				c = octet & 0x0f
				if c < 10 {
					c += '0'
				} else {
					c += 'A' - 10
				}
				if !put(emitter, c) {
					return false
				}
			}
		}
	}
	emitter.whitespace = false
	emitter.indention = false
	return true
}

func yaml_emitter_write_plain_scalar(emitter *yaml_emitter_t, value []byte, allow_breaks bool) bool {
	/*
		if bytes.IndexByte(value,[]byte(':'))!=-1{
			return yaml_emitter_analyze_scalar()
		}
	*/
	if !emitter.whitespace {
		if !put(emitter, ' ') {
			return false
		}
	}
	spaces := false
	breaks := false
	for i := 0; i < len(value); {
		if is_space(value, i) {
			if allow_breaks && !spaces && emitter.column > emitter.best_width && !is_space(value, i+1) {
				if !yaml_emitter_write_indent(emitter) {
					return false
				}
				i += width(value[i])
			} else {
				if !write(emitter, value, &i) {
					return false
				}
			}
			spaces = true
		} else if is_break(value, i) {
			if !breaks && value[i] == '\n' {
				if !put_break(emitter) {
					return false
				}
			}
			if !write_break(emitter, value, &i) {
				return false
			}
			emitter.indention = true
			breaks = true
		} else {
			if breaks {
				if !yaml_emitter_write_indent(emitter) {
					return false
				}
			}
			if !write(emitter, value, &i) {
				return false
			}
			emitter.indention = false
			spaces = false
			breaks = false
		}
	}

	emitter.whitespace = false
	emitter.indention = false
	if emitter.root_context {
		emitter.open_ended = true
	}

	return true
}

func yaml_emitter_write_single_quoted_scalar(emitter *yaml_emitter_t, value []byte, allow_breaks bool) bool {

	if !yaml_emitter_write_indicator(emitter, []byte{'\''}, true, false, false) {
		return false
	}

	spaces := false
	breaks := false
	for i := 0; i < len(value); {
		if is_space(value, i) {
			if allow_breaks && !spaces && emitter.column > emitter.best_width && i > 0 && i < len(value)-1 && !is_space(value, i+1) {
				if !yaml_emitter_write_indent(emitter) {
					return false
				}
				i += width(value[i])
			} else {
				if !write(emitter, value, &i) {
					return false
				}
			}
			spaces = true
		} else if is_break(value, i) {
			if !breaks && value[i] == '\n' {
				if !put_break(emitter) {
					return false
				}
			}
			if !write_break(emitter, value, &i) {
				return false
			}
			emitter.indention = true
			breaks = true
		} else {
			if breaks {
				if !yaml_emitter_write_indent(emitter) {
					return false
				}
			}
			if value[i] == '\'' {
				if !put(emitter, '\'') {
					return false
				}
			}
			if !write(emitter, value, &i) {
				return false
			}
			emitter.indention = false
			spaces = false
			breaks = false
		}
	}
	if !yaml_emitter_write_indicator(emitter, []byte{'\''}, false, false, false) {
		return false
	}
	emitter.whitespace = false
	emitter.indention = false
	return true
}

func yaml_emitter_write_double_quoted_scalar(emitter *yaml_emitter_t, value []byte, allow_breaks bool) bool {
	spaces := false
	if !yaml_emitter_write_indicator(emitter, []byte{'"'}, true, false, false) {
		return false
	}

	for i := 0; i < len(value); {
		if !is_printable(value, i) || (!emitter.unicode && !is_ascii(value, i)) ||
			is_bom(value, i) || is_break(value, i) ||
			value[i] == '"' || value[i] == '\\' {

			octet := value[i]

			var w int
			var v rune
			switch {
			case octet&0x80 == 0x00:
				w, v = 1, rune(octet&0x7F)
			case octet&0xE0 == 0xC0:
				w, v = 2, rune(octet&0x1F)
			case octet&0xF0 == 0xE0:
				w, v = 3, rune(octet&0x0F)
			case octet&0xF8 == 0xF0:
				w, v = 4, rune(octet&0x07)
			}
			for k := 1; k < w; k++ {
				octet = value[i+k]
				v = (v << 6) + (rune(octet) & 0x3F)
			}
			i += w

			if !put(emitter, '\\') {
				return false
			}

			var ok bool
			switch v {
			case 0x00:
				ok = put(emitter, '0')
			case 0x07:
				ok = put(emitter, 'a')
			case 0x08:
				ok = put(emitter, 'b')
			case 0x09:
				ok = put(emitter, 't')
			case 0x0A:
				ok = put(emitter, 'n')
			case 0x0b:
				ok = put(emitter, 'v')
			case 0x0c:
				ok = put(emitter, 'f')
			case 0x0d:
				ok = put(emitter, 'r')
			case 0x1b:
				ok = put(emitter, 'e')
			case 0x22:
				ok = put(emitter, '"')
			case 0x5c:
				ok = put(emitter, '\\')
			case 0x85:
				ok = put(emitter, 'N')
			case 0xA0:
				ok = put(emitter, '_')
			case 0x2028:
				ok = put(emitter, 'L')
			case 0x2029:
				ok = put(emitter, 'P')
			default:
				if v <= 0xFF {
					ok = put(emitter, 'x')
					w = 2
				} else if v <= 0xFFFF {
					ok = put(emitter, 'u')
					w = 4
				} else {
					ok = put(emitter, 'U')
					w = 8
				}
				for k := (w - 1) * 4; ok && k >= 0; k -= 4 {
					digit := byte((v >> uint(k)) & 0x0F)
					if digit < 10 {
						ok = put(emitter, digit+'0')
					} else {
						ok = put(emitter, digit+'A'-10)
					}
				}
			}
			if !ok {
				return false
			}
			spaces = false
		} else if is_space(value, i) {
			if allow_breaks && !spaces && emitter.column > emitter.best_width && i > 0 && i < len(value)-1 {
				if !yaml_emitter_write_indent(emitter) {
					return false
				}
				if is_space(value, i+1) {
					if !put(emitter, '\\') {
						return false
					}
				}
				i += width(value[i])
			} else if !write(emitter, value, &i) {
				return false
			}
			spaces = true
		} else {
			if !write(emitter, value, &i) {
				return false
			}
			spaces = false
		}
	}
	if !yaml_emitter_write_indicator(emitter, []byte{'"'}, false, false, false) {
		return false
	}
	emitter.whitespace = false
	emitter.indention = false
	return true
}

func yaml_emitter_write_block_scalar_hints(emitter *yaml_emitter_t, value []byte) bool {
	if is_space(value, 0) || is_break(value, 0) {
		indent_hint := []byte{'0' + byte(emitter.best_indent)}
		if !yaml_emitter_write_indicator(emitter, indent_hint, false, false, false) {
			return false
		}
	}

	emitter.open_ended = false

	var chomp_hint [1]byte
	if len(value) == 0 {
		chomp_hint[0] = '-'
	} else {
		i := len(value) - 1
		for value[i]&0xC0 == 0x80 {
			i--
		}
		if !is_break(value, i) {
			chomp_hint[0] = '-'
		} else if i == 0 {
			chomp_hint[0] = '+'
			emitter.open_ended = true
		} else {
			i--
			for value[i]&0xC0 == 0x80 {
				i--
			}
			if is_break(value, i) {
				chomp_hint[0] = '+'
				emitter.open_ended = true
			}
		}
	}
	if chomp_hint[0] != 0 {
		if !yaml_emitter_write_indicator(emitter, chomp_hint[:], false, false, false) {
			return false
		}
	}
	return true
}

func yaml_emitter_write_literal_scalar(emitter *yaml_emitter_t, value []byte) bool {
	if !yaml_emitter_write_indicator(emitter, []byte{'|'}, true, false, false) {
		return false
	}
	if !yaml_emitter_write_block_scalar_hints(emitter, value) {
		return false
	}
	if !put_break(emitter) {
		return false
	}
	emitter.indention = true
	emitter.whitespace = true
	breaks := true
	for i := 0; i < len(value); {
		if is_break(value, i) {
			if !write_break(emitter, value, &i) {
				return false
			}
			emitter.indention = true
			breaks = true
		} else {
			if breaks {
				if !yaml_emitter_write_indent(emitter) {
					return false
				}
			}
			if !write(emitter, value, &i) {
				return false
			}
			emitter.indention = false
			breaks = false
		}
	}

	return true
}

func yaml_emitter_write_folded_scalar(emitter *yaml_emitter_t, value []byte) bool {
	if !yaml_emitter_write_indicator(emitter, []byte{'>'}, true, false, false) {
		return false
	}
	if !yaml_emitter_write_block_scalar_hints(emitter, value) {
		return false
	}

	if !put_break(emitter) {
		return false
	}
	emitter.indention = true
	emitter.whitespace = true

	breaks := true
	leading_spaces := true
	for i := 0; i < len(value); {
		if is_break(value, i) {
			if !breaks && !leading_spaces && value[i] == '\n' {
				k := 0
				for is_break(value, k) {
					k += width(value[k])
				}
				if !is_blankz(value, k) {
					if !put_break(emitter) {
						return false
					}
				}
			}
			if !write_break(emitter, value, &i) {
				return false
			}
			emitter.indention = true
			breaks = true
		} else {
			if breaks {
				if !yaml_emitter_write_indent(emitter) {
					return false
				}
				leading_spaces = is_blank(value, i)
			}
			if !breaks && is_space(value, i) && !is_space(value, i+1) && emitter.column > emitter.best_width {
				if !yaml_emitter_write_indent(emitter) {
					return false
				}
				i += width(value[i])
			} else {
				if !write(emitter, value, &i) {
					return false
				}
			}
			emitter.indention = false
			breaks = false
		}
	}
	return true
}